//分值计算
var dataObj = function () 
{
	this.fruitNum = 0;
	this.double = 1;
	this.score = 0;
	this.gameOver = false;
	this.alpha = 0;
}
dataObj.prototype.draw = function()
{
	var w = can1.width;
	var h = can1.height;

	ctx1.save();
	ctx1.shadoBlur = 10;
	ctx1.shadowColor = "white";
	ctx1.fillStyle = "white";
	
	ctx1.fillText("分数 " + this.score, w * 0.5, h - 20);

	if(this.gameOver)
	{
		this.alpha  += deltaTime * 0.0005;
		if(this.alpha > 1)
			this.alpha = 1;


		ctx1.fillStyle = "rgba(255,255,255," + this.alpha +")";
		ctx1.fillText("游戏结束", w * 0.5, h * 0.5);
	}
	ctx1.restore();

}
dataObj.prototype.addScore = function()
{
	this.score += this.fruitNum * 10 * this.double;
	this.fruitNum = 0;
	this.double = 1;
}